package tracing;
public class Y
{
	private char cc;
	private String ss;


	public Y()
	{
		cc = 'a';
		ss = "AA";
	}
	
	
	public Y(char c, String s)
	{
		cc = c;
		ss = s;
	}
	
	
	public void uno()
	{
		System.out.println("cc = " + cc + "; ss = " + ss);
	}
	
	
	public void dos()
	{
		System.out.println("ss = " + ss + "; cc = " + cc);
		uno();
	}


	public void tres()
	{
		quatro();
	}


	public void quatro()
	{
		// This code is intended to throw a NullPointerException

		String s = null;
		System.out.println(s.length());
	}
}
